Magneto-optical recording medium and readout method of the same

Details Magneto-optical recording medium and readout method of the same Magneto-optical recording medium and readout method of the same

1997-08-26

2000-01-25

Edun, Muhammad

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369 13, 369110, G11B 700

Patent

active

060185112

ABSTRACT:
A magneto-optical recording medium includes at least a readout magnetic film and a recording magnetic film on a substrate, wherein information is recorded onto the recording magnetic film through magnetization of the recording magnetic film thereby forming domains therein, by a heating caused by irradiation of a recording light and application of a recording magnetic field, and the recorded information is read out through irradiation of a readout light thereby copying magnetization of the domains in the recording magnetic film to the readout magnetic film. The recording magnetic film is a perpendicular magnetic film in which the formed domains are retained The readout magnetic film Is a perpendicular magnetic film having a magnetic characteristic in which domains formed therein shrink The readout magnetic film contains no domains formed therein at a timing except for a readout operation to have a unidirectional magnetization.

REFERENCES:
patent: 5428586 (1995-06-01), Kobayashi et al.
patent: 5615180 (1997-03-01), Mieda et al.
K. Nishikiori et al.; "Magnetically Induced Super-Resolution Without an External Magnetic Field," Journal of Magnetic Society of Japan, vol. 21, No. 4-2, pp. 321-324, 1997.
M. Ota et al.; "Development of Magnetic-Optical Disk Realizing Double or Higher Density Reproduction Using Existing Optical System," Nikkei Electronics, No. 539, pp. 223-233, Oct. 28, 1991.
Search Report Application No. 97114755.8-2210; Dated May 12, 1998.
Nakajima et al.; 1995 Digest of Intermag. International Magnetics Conference, San Antonio, Apr. 18-21, 1995, Apr. 18, 1995, Institute of Electrical and Electronics Engineers, "New Magnetically Induced Super Resolution Disk By Using Exchange--. . . ".

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